Grain-separator



UNITED STATES PATENT OFFICE.

JOHN C. GREGG, OF HILLSBORO, OHIO.

GRAIN-SEPARATOR.

To all whom it may concern:

Be it known that I, JOHN C. GREGG, of Hillsboro, Highland county, Ohio,have invented a certain new and useful Improvement in Grain Screens orSeparators; and I hereby declare the following to be a full, clear, andexact description of the same, reference being had to the accompanyingdrawings, making part of this specification.

My invention consists in a peculiar combination of concentric screensand spiral conductors for the separation of different kinds of grain.

In the accompanying drawings, Figure 1,

is an axial section of the inner screen. Fig. 2, is an external view ofthe same. Fig. 3 is an external view of the intermediate screen. Fig. 4shows part of the outer screen. Fig. 5 is a section representing thefeeding mechanism.

A, B, O, are three cylinders of wire gauze of unequal diameter andfineness held concentrically one within the other by heads D, D, thecoarsest screen being the innermost or smallest one, and the finestscreen being the outermost or largest one.

Around the concavity of each screen is a spiral conveyer E E E". Anaperture cl in head D and apertures b c c in the gauze of the second andthird screens respectively allow the escape at their appropriate placesof the several grades of grain too coarse to escape through the meshesof the gauze.

F is a shaft by which the entire series of screens receives asimultaneous rotation. G is a feeding spout.

Operation: The screens being rotated and grain being supplied by thespout Gthe grass and like small seed and dust pass immediately throughthe meshes of the two inner screens and escape through those of theouter screen. The dust and other very small particles escaping first andthe grass and other small seeds at different distances along the lengthof the screen according to their relative sizes. The chafi' and lightWheat escape at aperture 0 in screen C. The No. 2 wheat through aperture6 in screen B and No. 1 wheat through aperture 01 in head D. The spiralconveyers serve to keep apart the partially cleansed and the uncleansedgrain, and forward the matter uniformly and gradually through thescreens.

The apparatus may if desired be so arranged as to elevate the grainduring the operation of cleaning.

I claim as new and of my invention herein and desire to secure byLetters Patent The combination of screens A, B, O, spiral conveyers E EE and apertures d b c c substantially as and for the purposes set forth.

In testimony of which invention, I hereunto set my hand.

JOHN C. GREGG.

Vitnesses GEo. H. KNIGHT,

C. STEEMER, Jr.

